Denial of service in Cisco IOS XE Software for Cisco Catalyst 3650, Catalyst 3850 and Catalyst 9000 Family Switches
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2022-20870 |
| CWE-ID | CWE-130 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Cisco IOS XE Operating systems & Components / Operating system Catalyst 3650 Series Switches Hardware solutions / Routers & switches, VoIP, GSM, etc Catalyst 3850 Series Switches Hardware solutions / Routers & switches, VoIP, GSM, etc Catalyst 9300 Series Switches Hardware solutions / Routers & switches, VoIP, GSM, etc Catalyst 9400 Series Switches Hardware solutions / Routers & switches, VoIP, GSM, etc Catalyst 9500 Series Switches Hardware solutions / Routers & switches, VoIP, GSM, etc Catalyst 9600 Series Switches Hardware solutions / Routers & switches, VoIP, GSM, etc |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Improper Handling of Length Parameter Inconsistency
EUVDB-ID: #VU67735
Risk: High
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2022-20870
CWE-ID:
CWE-130 - Improper Handling of Length Parameter Inconsistency
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient input validation of IPv4 traffic in the egress MPLS packet processing function. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco IOS XE: 16.12.4 - 17.3.4
Catalyst 3650 Series Switches: All versions
Catalyst 3850 Series Switches: All versions
Catalyst 9300 Series Switches: All versions
Catalyst 9400 Series Switches: All versions
Catalyst 9500 Series Switches: All versions
Catalyst 9600 Series Switches: All versions
CPE2.3- cpe:2.3:o:cisco_systems:cisco_ios_xe:16.12.4:*:*:*:*:*:*:*
- cpe:2.3:o:cisco_systems:cisco_ios_xe:17.3.4:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:catalyst_3650_series_switches:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:catalyst_3850_series_switches:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:catalyst_9300_series_switches:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:catalyst_9400_series_switches:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:catalyst_9500_series_switches:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:catalyst_9600_series_switches:*:*:*:*:*:*:*:*
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
